Gregory, SD Radon Levels

Q: What EPA Radon Zone is Gregory in?

Gregory is in Gregory County, EPA Zone 2.

Q: How much does radon mitigation cost in Gregory?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Gregory radon levels and find certified testing and mitigation professionals to keep your home safe

Gregory, SD Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Gregory County, SD

Zip Code 57533

As the county seat of Gregory County in south-central South Dakota, Gregory sits on Pierre Shale formations that can contribute to moderate radon potential. Limited testing data for zip code 57533 emphasizes the need for individual home testing throughout the community. The Great Plains geology and local housing characteristics create variable conditions that require site-specific radon assessment.

Gregory, SD Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon FAQ for Gregory, SD

What EPA Radon Zone is Gregory in?

Gregory and the 57533 zip code are in Gregory County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Gregory?

Radon mitigation in Gregory typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Gregory?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in South Dakota

Cities in South Dakota with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Spearfish	7.75 pCi/L	4
Rapid City	10.50 pCi/L	2
Aberdeen	8.50 pCi/L	2
Sioux Falls	6.00 pCi/L	2
Watertown	6.00 pCi/L	2